findseed.rb

expected = %w{1 2 Fizz 4 Buzz Fizz 7 8 Fizz Buzz 11 Fizz 13 14 FizzBuzz};
seed = 0;

begin
  puts "trying seed #{seed}"
  r = Random.new(seed)
  throw :nope unless (0..11).to_a.all? {|i| [i+1, "Fizz", "Buzz", "FizzBuzz"][r.rand(4)] == expected[i] }
  puts "drusepth: Seed #{seed} will do the job just fine"
rescue
  seed += 1
  retry
end